<template>
  <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!--卡片视图-->
    <el-card>
      <!--添加角色按钮区域-->
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>

      <el-table :data="roleList" border stripe>
        <!--展开列-->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row :class="['vcenter', 'bdbottom', i1 === 0 ? 'bdtop' : '']" v-for="(item1, i1) in scope.row.children"
              :key="item1.id">
              <!--渲染一级权限-->
              <el-col :span="5">
                <el-tag @close="removeRightById(scope.row, item1.id)" closable>
                  {{ item1.authName }}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>

              <!--渲染二级和三级权限-->
              <el-col :span="19">
                <!--通过for循环嵌套渲染一级权限-->
                <el-row :class="['vcenter', i2 === 0 ? '' : 'bdtop']" v-for="(item2, i2) in item1.children"
                  :key="item2.id">
                  <el-col :span="6">
                    <el-tag type="success" @close="removeRightById(scope.row, item2.id)" closable>{{ item2.authName }}
                    </el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag type="warning" v-for="item3 in item2.children" :key="item3.id" closable
                      @close="removeRightById(scope.row, item3.id)">
                      {{ item3.authName }}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
            <!-- <pre>{{ scope.row }}</pre> -->
            <!-- 就是用来表示计算机的源代码 -->
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column label="#" type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
            <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
            <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限
            </el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!--分配权限 对话框 -->
    <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
      <!-- 树形控件 -->
      <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" default-expand-all
        :default-checked-keys="defKeys" ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
  export default {
    name: "VueRoles",

    components: {},

    directives: {},

    data() {
      return {
        //所有角色列表数据
        roleList: [],
        // 控制分配权限对话框的显示与隐藏
        setRightDialogVisible: false,
        //所有权限的数据
        rightslist: [],
        // 树形控件的属性绑定对象
        treeProps: {
          label: "authName",
          children: "children"
        },
        // 默认选中的节点id值数组
        defKeys: [],
        //当前即将分配权限的角色id
        roleld: ""
      };
    },
    created() {
      this.getRolesList();
    },
    mounted() {},

    methods: {
      // 获取权限列表
      async getRolesList() {
        const {
          data: res
        } = await this.$http.get("roles");
        if (res.meta.status != 200) {
          return this.$message.error("获取角色列表数据失败!");
        }
        this.roleList = res.data;
        // console.log(this.roleList);
      },
      //根据id删除对应的权限
      async removeRightById(role, rightId) {
        //弹框提示用户是否要删除
        const confirmResult = await this.$confirm(
          "此操作将删除该角色此权限, 是否继续?",
          "提示", {
            confirmButtonText: "确定",
            cancelButtonText: "取消",
            type: "warning"
          }
        ).catch(err => err);
        // console.log(confirmResult);
        if (confirmResult !== "confirm") {
          return this.$message.info("取消了删除!");
        }
        // 确认已经删除成功
        const {
          data: res
        } = await this.$http.delete(
          `roles/${role.id}/rights/${rightId}`
        );
        if (res.meta.status !== 200) {
          return this.$message.error("删除权限失败!");
        }
        // 重新加载,刷新权限列表,直接刷用户体验不好
        // this.getRolesList();
        // 返回的data, 是当前角色下最新的权限数据
        role.children = res.data;
      },
      //展示分配权限的对话框
      async showSetRightDialog(role) {
        this.roleld = role.id;
        // 获取所有权限的数据
        const {
          data: res
        } = await this.$http.get("rights/tree");
        if (res.meta.status !== 200) {
          return this.$message.error("获取权限数据失败!");
        }
        //把获取到的权限数据保存到data
        this.rightslist = res.data;
        // console.log(this.rightslist);
        // 递归获取三级节点的Id
        this.getLeafkeys(role, this.defKeys);

        this.setRightDialogVisible = true;
      },
      // 通过递归的形式，获取角色下所有三级权限的id 并保存到数组中去
      getLeafkeys(node, arr) {
        //如果当前node节点不包含children属性，则是三级节点
        if (!node.children) {
          return arr.push(node.id);
        }
        // 不是三级节点,递归遍历
        node.children.forEach(item => this.getLeafkeys(item, arr));
      },
      //监听分配权限对话框的关事件
      setRightDialogClosed() {
        this.defKeys = [];
      },
      // 点击为角色分配权限
      async allotRights() {
        let keys = [
          ...this.$refs.treeRef.getCheckedKeys(),
          ...this.$refs.treeRef.getHalfCheckedKeys()
        ];
        // console.log(keys);
        const idStr = keys.join(",");
        const {
          data: res
        } = await this.$http.post(
          `roles/${this.roleld}/rights`, {
            rids: idStr
          }
        );
        if (res.meta.status !== 200) {
          return this.$message.error("分配权限失败!");
        }
        this.$message.success("分配权限成功!");
        this.getRolesList();
        this.setRightDialogVisible = false;
      }
    }
  };

</script>

<style lang="less" scoped>
  .el-tag {
    margin: 7px;
  }

  .bdtop {
    border-top: 1px solid #eee;
  }

  .bdbottom {
    border-bottom: 1px solid #eee;
  }

  .vcenter {
    display: flex;
    align-items: center;
  }

</style>
